Regenerator for metallurgic and other furnaces



(No Modei.) 2 sheets-sheen 1. M. v. SMITH.

REGENERATOR .FOR METALLURGIG AND OTHER FURNACES. No; 261,057. Patente.11, 1882.

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M. v. SMITH.

REGENERATOR FOR METALLURGIG AND OTHER FURNAGES. No. 261,057.Patented-Julyll, 1882.4

HEN-1555.5 WWW &

UNITED STATES PATENT OFFICE.

MARTIN V. SMITH, OF MOKEESPORT, PENNSYLVANIA.

REGENERATOR FOR METALLURGIC AND OTHER FURNACES.

SPECIFICATION forming part of Letters Patent No. 261,057, dated July 11,1882.

Application filed January 31, 1882.

To all whom it may concern: I

Be it known that I, ll/IARTIN V. SMITH, of McKeesport, in the county ofAllegheny and State of Pennsylvania, have invented a new and usefulImprovement in Regenerators for Metallurgic and other Furnaces; and I dohereby declare the following to be a full, clear, and exact descriptionthereof, reference being had to the accompanying drawings, forming apart of this specification, in which Figure 1 is a vertical section of apair of regenerators and part of a metallurgic furnace, and Fig. 2 is across-section of the regenerators on the line a 00, Fig. 1.

Like letters of reference indicate like parts in each.

My invention relates to the regenerators used for heating the gas or airin regenerative metallurgic, blast, glass, and other furnaces. Inmetallurgio furnaces these regenerators are generally located under orbelow the furnace,

and the heated gas and air pass up through their respective regeneratorsinto the furnace above, while on the reversal of the draft the heatedproducts of combustion pass down into and through the regenerators. Theheat in these furnaces is so great that it melts the firebriok formingthe surface of the fines and causes it to run down into theregenerators, and, where no provision is made to retain it in the upperpart of the regenerators, unites-with the red oxide of iron, soot, andother substances carried over by the draft and clogs up the spaces inthe checker-work of the regenerators, finally filling them up to such anextent that they are rendered useless. In the usual regeneratorprovision is made to retain this melted fire-brick and other substancesby means of a shelf formed of tiles resting on top of the checker-work;but it is found that this shelf fills rapidly and is exceedinglydifficult to clean, the fire-brick and other substances caking anduniting with the tile of the shelf, and, as itis not sufficientlysupported to withstand the jarring necessary to break off thesubstances, it is generally necessary to remove the shelf, and as thedebris fills the checkerwork in so doing, that must also be removed.Regenerators have also been formed with a shelf supported by the wallsbelow the furnace- (No model.)

flue, the shelf being slightly inclined and arranged to shed thesubstances from the flue into a pocket at the side of the checker-work,the pocket necessarily increasing the size of the regenerator, which isgreatly objectionable where they are built under the furnace.

By my invention the objections found in these different constructions ofregenerators are entirely overcome.

It consists essentially in a regenerator having a shelf for retainingthe'substances from the furnace-flue, supported by the regeneratorwallsbelow the furnace-flue and above the checker-work, the shelf beingprovided with one or more ports and a ridge-wall extending along theshelf between the ports and the furnace-flue' To this end it consists informing the regenerators with one or more shelves or receptacles forretaining the melted fire-brick and other substances, supported by theregenerator-walls below the furnace-flue and above the checker-work, andprovided with one or more ports at one side of the receptacle for thepassage of the air, gas, or products of combustion out of or into thechecker-work.

To enable others skilled in the art to make and use myinvent-ion, I willdescribe the same more fully.

In thedrawingsreferred to,A representsone end of a metallurgic furnace;B, the gas-flue, leading from the gas-regenerator D into the furnace;and O, the air-flue, (shown partly by dotted lines,) leading from theair-regenerator E into thefurnace. The regenerators arebuilt below thefurnace, and their respective fines B or 0 enter through the top wallsor roofs,f, which are generally formed of arches meeting on thedividing-wall g between the regenerators. Extendingacrosseachregeneratorbelow the arched top wall, f, is the arched shelf h, whichfits into and is supported by the side and end walls of the regenerator.The arched shelf It has one or more ports or openings, 70, ex tendingthrough it at the side opposite the flue leading to the furnace, the gasor air passing up through the regenerator through the ports 70, over thearched shelf h, and from thence through the flue to the furnace. Thesize of the ports it corresponds to that of the flue B too through theports or opening into the checkerwork below when the shelf is cleaned.If desired, two or more of these arched shelves It may be employed, asshown, in the air-regenerator E, to give more surface for the deposit ofsoot, red oxide ofiron, and other substances carried over by the draft,and to retain any substances running over from the upper shelf in caseit should overflow. In this case the ports k of the lower shelf are atthe opposite side from those of the upper shelf, so that the draft willnecessarily pass between the shelves into or out of the checker-work.When more of the regen'erator should be proportionately increased toallow full space for the checkerwork. The regenerators are built up withbrick in the usual manner, forming the checker-work 1? below the archedshelves. As the checker-work is separate from and does not support thereceptacle for the melted fire-brick,

- 850., it can be built of lighter brick, and therefore expose a largerheating-surface than where the receptacle rests on the checker-work. The

- man-holen, by which the regenera tor is entered,

is shown in dotted lines.

1?. is the pit of the regenerator under the the checker-work.

When my improved regeuerators are employed the gas or air passes upthrough the checker-work, absorbing the heat therefrom, and then, it butone arched shelf is employed, through the port or ports 70, over thearched shelf, from which it passes through the flueB or G into thefurnace-chamber. After combustion in this chamber the products ofcombustion pass down the flues on the other side, over the archedshelves h in the regenerator, and through the ports and checker-workp tothe stack. The heat from the draft and products of combustion in passingfrom the furnace-chamber is so great that it melts the firebrick on itsdownward passage, and this melted fire-brick runs down onto the archedshelf or receptacle h, and is retained thereby, thered oxide ofiron,soot, and other substances carried over by the draft being also to agreat extent retained on this shelf and with the melted fire-brick eaking thereon. Where two or more of these shelves are employed the upwarddraft or blast passes up through the ports of thelower one and betweenthe shelves, absorbing the heat from their walls, and then through theports of the upper shelf, following the coursedescribed above, and theproducts of combustion in passing down pass through the ports of theupper shelf, between the shelves, and through the ports of the lowerone, the surface for the deposit of the soot and other substances beingdoubled, so that very little passes into the checker-work, and the lowershelf retains any of the melted fire-brick which might run over from theupper shelf. Upon the reversal of the draft these sub stances areretained in the same manner by the shelves in the other regenerators.'As the shelves or receptacles are much larger than the shelves formerlyemployed and the draft passes entirely over them, a much largerproportion of the oxide, soot, and other substances is retained thereonand the clogging or choking up of the checker-work by these substancesis prevented.

When it is desired to empty or clean off the shelves, all thatisnecessary is to take down the upper part of the man-holes it, thusobtaining access to them, and if the melted fire-brick and othersubstances are caked thereon they can be cut or broken off withoutdisturbing the checker-work below or permitting any part thereof to fallinto the checker-work, as the arched shelf is firmly supportedindependently of the checker-work, and the arch extends entirely acrossthe regenerator, except where the ports are located, and that edge isprotected by the ridge-wall l. The checker-work can also be renewedwithout disturbing the shelf or its ports.

What I claim as my invention, and desire to secure by Letters Patent,is-

In a regenerative gas-furnace, a regenerator having a shelf supported bythe regeneratorwalls below the furnace-flue and above the checker-work,said shelf having one or more ports and a ridge-wall extending along theshelf between the port and the furnace-flue, substantially as and forthe purposes setforth.

In testimony whereof I, the said MARTIN V. SMITH, have hereunto set myhand.

MARTIN V. SMITH.

Witnesses:

JAMES I. KAY, F. G. KAY.

